Manchester United returned to the Premier League summit with a 2-0 win over Portsmouth, while Chelsea and Everton drew 0-0 at Stamford Bridge.The Red Devils lost their grip on top spot just 24 hours earlier after Liverpool's thrilling 4-4 draw with Arsenal, but goals from Wayne Rooney (9) and Michael Carrick (82) sent Sir Alex Ferguson's side back to the summit, with a game in hand on their north-west rivals.